nonprofit open-source social network project

Mastodon

A nonprofit open-source project and federated social-network ecosystem built around ActivityPub-compatible servers rather than one global platform owner. Mastodon scores well because open source code, nonprofit stewardship, federation, and user exit rights structurally limit extraction and private-government power.

Why this matters: Mastodon is one of the strongest mainstream examples of social networking designed around exit, federation, and non-extractive stewardship.

Letter grade A Good Medium confidence (AI) Rubric gcd-rubric-v1 Last reviewed May 12, 2026

Final Score 66* A - Good

AGOOD66 pts

* Tentative scaffolding score. Not human-checked or final.

Base Material57

Bonus+12

Cap66No structure cap

After Cap66

Penalties0

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Evaluation Overview

A - Good

The score turns mainly on Ownership; no penalty currently dominates the evaluation.

Strengths

Ownership8/10
Governance8/10
Extraction8/10

Penalties

No penalties applied in this version.

Evidence state

ConfidenceMedium confidence (AI)
ThoroughnessDeveloped (AI)
Linked claims14
Direct axis claims14
Coverage14/14

Scoring Axes

Axis	Score	Why this score
Ownership ? Control rights: shareholder-dominated at 0, worker cooperative control at 10.	8 / 10	The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Ownership remains outside direct user, worker, or community control unless the organization is explicitly open-source, nonprofit, or federated. This supports strong Ownership credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Ownership. Linked evidence Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Ownership remains outside direct user, worker, or community control unless the organization is explicitly open-source, nonprofit, or federated. [1]
Governance ? Binding decision authority: centralized control at 0, democratic stakeholder control at 10.	8 / 10	The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Governance evidence centers on who controls policies, moderation, ranking, protocols, and enforcement. This supports strong Governance credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Governance. Linked evidence Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Governance evidence centers on who controls policies, moderation, ranking, protocols, and enforcement. [2]
Extraction ? Surplus allocation, wage share, CEO pay ratio, margins, and structured extraction judgment.	8 / 10	The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Extraction turns on whether platform value is captured by owners or structurally returned to users, workers, communities, or the public. This supports strong Extraction credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Extraction. Linked evidence Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Extraction turns on whether platform value is captured by owners or structurally returned to users, workers, communities, or the public. [3]
Labor Sovereignty ? Worker power: coercive conditions at 0, co-determination or ownership at 7. Employee dissatisfaction matters only when source-backed evidence shows concrete limits on worker agency, such as coercive scheduling, retaliation, wage theft, harassment, unsafe conditions, suppression of worker voice, or extreme turnover.	6 / 7	The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Labor-sovereignty evidence includes paid employees, creators, volunteer moderators, developers, and community operators affected by platform control. This supports meaningful Labor Sovereignty credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Labor Sovereignty. Linked evidence Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Labor-sovereignty evidence includes paid employees, creators, volunteer moderators, developers, and community operators affected by platform control. [4]
Solidarity with the Unemployed ? Treatment of exits and nonworkers, including severance, redeployment, and non-competes.	6 / 7	The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Solidarity evidence asks whether people outside paid employment receive durable access, exit, or support rather than mere platform access. This supports meaningful Solidarity with the Unemployed credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Solidarity with the Unemployed. Linked evidence Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Solidarity evidence asks whether people outside paid employment receive durable access, exit, or support rather than mere platform access. [5]
Loss-Bearing Fidelity ? Willingness to absorb costs to preserve values, workers, users, and public obligations.	6 / 7	The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Loss-bearing fidelity depends on whether the platform absorbs costs to preserve user rights, safety, privacy, and public obligations. This supports meaningful Loss-Bearing Fidelity credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Loss-Bearing Fidelity. Linked evidence Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Loss-bearing fidelity depends on whether the platform absorbs costs to preserve user rights, safety, privacy, and public obligations. [6]
Market Conduct ? Pricing fairness, switching costs, lock-in, and rent extraction.	5 / 5	The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Market conduct depends on lock-in, switching costs, monetization, subscription pressure, advertising, and interoperability. This supports meaningful Market Conduct credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Market Conduct. Linked evidence Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Market conduct depends on lock-in, switching costs, monetization, subscription pressure, advertising, and interoperability. [7]
Product Integrity ? Preservation of quality rather than degradation for monetization.	5 / 5	The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Product integrity turns on whether useful communication is preserved or degraded by ranking, advertising, surveillance, or engagement incentives. This supports meaningful Product Integrity credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Product Integrity. Linked evidence Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Product integrity turns on whether useful communication is preserved or degraded by ranking, advertising, surveillance, or engagement incentives. [8]
Scale Integrity ? Whether growth improves or degrades fairness and accountability.	5 / 5	The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. The linked record identifies Mastodon as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Scale integrity depends on whether growth distributes power or concentrates private control over public conversation. This supports meaningful Scale Integrity credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Scale Integrity. Linked evidence Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Scale integrity depends on whether growth distributes power or concentrates private control over public conversation. [9]

Penalties

No penalties applied in this version.

Bonus Credits

Bonus	Credit	Why this credit
Openness to Dissent ? Credit for tolerating internal, user, customer, worker, and public dissent without retaliation, capture, or viewpoint laundering.	3 / 3	Mastodon federation lets communities choose servers, policies, and moderation approaches rather than submit to one central feed authority. Mastodon federation lets communities choose servers, policies, and moderation approaches rather than submit to one central feed authority. This supports Openness to Dissent credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Openness to Dissent. Linked evidence Mastodon federation lets communities choose servers, policies, and moderation approaches rather than submit to one central feed authority. [10]
Constitutional Spirit ? Credit for respecting constitutional rights and civil-liberties norms even where private law does not strictly require it.	3 / 3	Mastodon better respects associational freedom and exit rights through federation and self-hosting. Mastodon better respects associational freedom and exit rights through federation and self-hosting. This supports Constitutional Spirit credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Constitutional Spirit. Linked evidence Mastodon better respects associational freedom and exit rights through federation and self-hosting. [11]
Good Deal ? Credit for unusually fair value: durable quality, fair pricing, low lock-in, and clear customer surplus.	3 / 3	Mastodon offers free open-source social networking without native advertising lock-in. Mastodon offers free open-source social networking without native advertising lock-in. This supports Good Deal credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Good Deal. Linked evidence Mastodon offers free open-source social networking without native advertising lock-in. [12]
Cost Transparency ? Credit for clear posted prices, all-in fees, unit costs, public rate cards, margin/cost visibility, or surplus-allocation transparency, especially in markets where opaque quotes, hidden fees, or individualized pricing are normal.	2 / 3	Mastodon nonprofit reporting and open-source development make stewardship more visible than ordinary closed social platforms. Mastodon nonprofit reporting and open-source development make stewardship more visible than ordinary closed social platforms. This supports Cost Transparency credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Cost Transparency. Linked evidence Mastodon nonprofit reporting and open-source development make stewardship more visible than ordinary closed social platforms. [13]
Anti-Scapegoating Culture ? Credit for documented non-punitive practices that prevent scapegoating, mobbing, and isolate-and-expel dynamics. Ordinary civility, peer support, or anti-bullying branding is not enough; the practice must also avoid public shaming, punitive pile-ons, and scapegoating of alleged scapegoaters.	1 / 3	Mastodon’s federated structure can reduce pile-on centrality by letting communities separate, block, and govern locally rather than force one universal arena. Mastodon’s federated structure can reduce pile-on centrality by letting communities separate, block, and govern locally rather than force one universal arena. This supports Anti-Scapegoating Culture credit for Mastodon because the evidence changes who controls the platform relationship, who bears the risk, and how easy exit is for users or communities. Compared with Reddit, Twitter (X), TikTok, and Discord, the open-source federated model gives users and communities stronger exit rights and less extractive default governance. Calibration notes Comparative anchor: Social-platform comparative pass for Anti-Scapegoating Culture. Linked evidence Mastodon’s federated structure can reduce pile-on centrality by letting communities separate, block, and govern locally rather than force one universal arena. [14]

Confidence Basis

Confidence is computed from the evidence trail and review state, not typed into the profile by hand.

Medium 78/100

14 verified linked claims 14 direct axis claims 0 disputed claims 14/14 components covered

This confidence label measures the source-backed evidence trail. AI-scaffolded scores remain tentative until human review.

Claim confidence 13/20

14 verified linked claims

Source quality 12/18

Best source per verified claim, weighted by institutional reliability

Direct axis-specific claims 14/18

14 direct claims across 14 active components

Dispute load 12/12

0 disputed claims on this entity

Recency 10/10

Newest accepted timestamp: May 13, 2026

Reviewer status 7/12

Human-reviewed components score higher than AI scaffolding

Component coverage 10/10

14/14 evidence-bearing components have direct support

Evidence State

Profile stateAI draft / human-pending

VerificationUnverified

ConfidenceMedium confidence (AI)

ThoroughnessDeveloped (AI)

Correction routeUse “Challenge this rating” for factual errors, missing counterevidence, source problems, or calculation mistakes.

Company responseCompany representatives can submit source-backed corrections; payment never changes scores or reviewer authority.

Claims and Sources

Claims are the evidence record. Each claim needs a source link, axis category, status, confidence level, and timestamp before it can support a score.

* Tentative scaffolding score. Not human-checked or final.

1Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Ownership remains outside direct user, worker, or community control unless the organization is explicitly open-source, nonprofit, or federated.

Ownership Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

2Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Governance evidence centers on who controls policies, moderation, ranking, protocols, and enforcement.

Governance Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

3Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Extraction turns on whether platform value is captured by owners or structurally returned to users, workers, communities, or the public.

Extraction Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

4Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Labor-sovereignty evidence includes paid employees, creators, volunteer moderators, developers, and community operators affected by platform control.

Labor Sovereignty Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

5Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Solidarity evidence asks whether people outside paid employment receive durable access, exit, or support rather than mere platform access.

Solidarity Unemployed Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

6Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Loss-bearing fidelity depends on whether the platform absorbs costs to preserve user rights, safety, privacy, and public obligations.

Loss Bearing Fidelity Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

7Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Market conduct depends on lock-in, switching costs, monetization, subscription pressure, advertising, and interoperability.

Market Conduct Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

8Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Product integrity turns on whether useful communication is preserved or degraded by ranking, advertising, surveillance, or engagement incentives.

Product Integrity Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

9Mastodon describes itself as free, open-source decentralized social media developed by nonprofit Mastodon organizations and independently operated servers. Scale integrity depends on whether growth distributes power or concentrates private control over public conversation.

Scale Integrity Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

10Mastodon federation lets communities choose servers, policies, and moderation approaches rather than submit to one central feed authority.

Openness To Dissent Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

11Mastodon better respects associational freedom and exit rights through federation and self-hosting.

Constitutional Spirit Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

12Mastodon offers free open-source social networking without native advertising lock-in.

Good Deal Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

13Mastodon nonprofit reporting and open-source development make stewardship more visible than ordinary closed social platforms.

Cost Transparency Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

14Mastodon’s federated structure can reduce pile-on centrality by letting communities separate, block, and govern locally rather than force one universal arena.

Anti Scapegoating Culture Verified Medium confidence Human-reviewed May 12, 2026

Mastodon aboutOfficial self-description · 68%
Mastodon forms new U.S. non-profitGeneral web source · 58%

Competitors

AGOOD66 Lemmy open-source federated forum software · same market AGOOD64 Python Software Foundation open-source nonprofit foundation · same market AGOOD63 GNOME Foundation membership-based free-software foundation · same market AGOOD63 Tor Project nonprofit privacy-technology project · same market AGOOD60 Electronic Frontier Foundation nonprofit digital-rights organization · same market AGOOD58 Software Freedom Conservancy free-software nonprofit fiscal sponsor · same market CPERFORMATIVE41 Linux Foundation nonprofit consortium · same market DEXTRACTIVE32 Mozilla Foundation nonprofit · same market

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